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Hughes TH-55 Osage Hughes H-4 Hercules Hughes D-2 Hughes XF-11 Hughes OH-6 Cayuse Hughes XH-17 Hughesville, Pennsylvania Hughes, Arkansas Hughes Springs, Texas Hughes, WisconsinTài liệu tham khảo
WikiPedia: Hughes_H-4_Hercules http://www.aafo.com/goose/ http://www.imdb.com/title/tt0338751/ http://www.se-technology.com/wig/html/main.php?ope... http://www.sprucegoose.org/ //tools.wmflabs.org/geohack/geohack.php?language=v... https://commons.wikimedia.org/wiki/Category:Hughes...